Blackberry Buck

Muddle the blackberries in a shaker until well mashed.

Add the bourbon, freshly squeezed lemon juice, ginger syrup, and balsamic vinegar to the shaker.

Shake the mixture vigorously to combine all the ingredients.

Double strain the mixture into an ice-filled highball glass.

Top with ginger beer to add effervescence.

Garnish with a couple of cracks of black pepper for a subtle aromatic finish.